US3713045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator with a piezo-mechanical vibrator
Assignee: NEC Corp
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Filing: 1971-06-02
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Granted: 1973-01-23
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Expires: 1991-06-02
Abstract
Abstract Improved oscillator including an oscillator element, amplifier, amplitude limiter and tuned output circuit. A feedback path is provided between the tuned output circuit and the oscillator element. The amplitude limiter is connected between the amplifier and the tuned circuit to provide a constant amplitude signal to the tuned output circuit notwithstanding variations in the output from the amplifier caused by variation in the ambient temperature and aging. Further, by providing a resistance between the amplitude limiter circuit and the tuned circuit the resonance Q of the tuned circuit can be made high without producing an adverse effect on the amplitude limiter circuit.
Inventors
- 👤 K Uehara
- 👤 H Uchida
- 👤 S Usuda
- 👤 K Hamazato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/323; H03B5/02; H03B5/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
An oscillator with a piezo-mechanical vibrator, comprising: an oscillation amplification circuit having an input coupled to said piezo-mechanical vibrator and an amplitude-limiter circuit at the output side thereof; a series circuit of a tuning transformer and a resistor which operates as a load of said oscillation amplification circuit; and a feedback circuit which feeds a feedback signal from the connection point of said resistance and said tuning transformer to said piezo-mechanical vibrator.
Claim 2
Dependent Claim
72 words
An oscillator with a piezo-mechanical vibrator, comprising: an oscillation amplification circuit having an input coupled to said piezo-mechanical vibrator and an amplitude-limiter circuit at the output side thereof; a series circuit of a tuning transformer and a resistor which operates as a load of said oscillation amplification circuit; and a feedback circuit which feeds a feedback signal from the connection point of said resistance and said tuning transformer to said piezo-mechanical vibrator.
Claim 3
Dependent Claim
107 words
An oscillator circuit comprising: a. a piezo-mechanical vibrator, b. amplifying means coupled to said piezo-mechanical vibrator for amplifying the oscillations produced thereby, c. an amplitude limiter means connected to the output of said amplifying means for limiting the amplitude of the oscillations, d. a tuned circuit, e. means, including a first resistance means of a value equal to the input impedance of said tuned circuit, for connecting said amplifying means to said tuned circuit, said first resistance means being connected between said amplitude limiter means and said tuned circuit, and f. feedback means, including a second resistance means, connected between said tuned circuit and said piezo-mechanical vibrator.
Claim 4
Dependent Claim
107 words
An oscillator circuit comprising: a. a piezo-mechanical vibrator, b. amplifying means coupled to said piezo-mechanical vibrator for amplifying the oscillations produced thereby, c. an amplitude limiter means connected to the output of said amplifying means for limiting the amplitude of the oscillations, d. a tuned circuit, e. means, including a first resistance means of a value equal to the input impedance of said tuned circuit, for connecting said amplifying means to said tuned circuit, said first resistance means being connected between said amplitude limiter means and said tuned circuit, and f. feedback means, including a second resistance means, connected between said tuned circuit and said piezo-mechanical vibrator.
Claim 5
Dependent Claim
21 words
The oscillator circuit of claim 2 wherein said second resistance is adjustable to vary the exciting potential supplied to said vibrator.
Claim 6
Dependent Claim
29 words
The oscillator circuit of claim 3 wherein saiD amplitude limiter circuit comprises first and second serially connected zener diodes with capacitor means serially connected to the zener diode pair.
Claim 7
Dependent Claim
14 words
The oscillator circuit of claim 4 wherein said piezo-mechanical vibrator is a piezo-electric crystal.
Claim 8
Dependent Claim
13 words
The oscillator circuit of claim 4 wherein said piezo-mechanical vibrator is a tuning-fork-vibrator.
References Cited (Backward Citations)
US3218575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |